Implement improved version handling and semantic versioning

- Add semver library for semantic version comparison
- Make package.json the single source of truth for version
- Add version check to only offer updates when remote version is higher
- Use APP_VERSION constant throughout server instead of hardcoded values
- Refactor update checking logic to use semver.gt() for proper comparison

This change improves robustness by ensuring updates are only
offered when a higher semantic version is available in the repository.

🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>

server-endpoints.js

@@ -6,6 +6,7 @@ const { promisify } = require('util');
 const execAsync = promisify(exec);
 const fs = require('fs');
 const path = require('path');
+const semver = require('semver'); // Add this - for semantic version comparison
 
 // Add these endpoints
 
@@ -60,9 +61,8 @@ app.get('/api/system/check-updates', async (req, res) => {
       });
     }
     
-    // Get current version
-    const packageJson = JSON.parse(fs.readFileSync(path.join(__dirname, 'package.json'), 'utf8'));
-    const currentVersion = packageJson.version;
+    // Get current version from the global APP_VERSION constant
+    const currentVersion = APP_VERSION;
     
     // Check for test mode flag which forces update availability for testing
     const testMode = req.query.test === 'true';
@@ -94,13 +94,17 @@ app.get('/api/system/check-updates', async (req, res) => {
       const remotePackage = JSON.parse(remotePackageJson);
       const remoteVersion = remotePackage.version;
       
+      // Compare versions semantically - only consider it an update if remote version is higher
+      const isNewerVersion = semver.gt(remoteVersion, currentVersion);
+      
       return res.json({
         status: 'success',
         data: {
-          updateAvailable: true,
+          updateAvailable: isNewerVersion,
           currentVersion,
           remoteVersion,
-          commitsBehind: behindCount
+          commitsBehind: behindCount,
+          newerVersion: isNewerVersion
         }
       });
     } else {